Coal mine screening equipment for coal mining
By designing a rotatable screen structure and rotating components, the problem of the inability to flexibly adjust the screen size of existing coal mine screening equipment has been solved, realizing efficient and simple screening operations and improving production efficiency and equipment automation level.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-31
AI Technical Summary
The screens of existing coal mine screening equipment are usually fixed and cannot be flexibly adjusted. This makes screen replacement cumbersome, affects production progress, and is prone to clogging during the screening of materials with high moisture content, thus reducing screening efficiency.
The design includes a screen with fine and coarse sections, equipped with a rotatable retaining ring and trough structure. Flexible screen switching is achieved through rotating components such as motors and gears. Combined with an electric telescopic rod and controller, the screening process is optimized and the chance of clogging is reduced.
It simplifies screen replacement operations, reduces downtime, improves production efficiency, reduces operating difficulty and maintenance costs, and enhances screening efficiency and automation levels.
Smart Images
Figure CN224057946U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal mine screening technology, specifically relating to a coal mine screening device used in coal mine development. Background Technology
[0002] Coal screening is a crucial step in the coal mining process, directly impacting the efficiency of subsequent coal processing and utilization.
[0003] There are various types of screening equipment, the most common being fixed screens and drum screens. The screens in these screening devices are generally fixed and can usually only screen coal blocks within a specific particle size range. The size of the screen holes cannot be flexibly adjusted. When it is necessary to screen coal blocks of different particle sizes, it is often necessary to replace the entire screen, which is not only cumbersome to operate, but also increases downtime and affects the production schedule.
[0004] To address the aforementioned issues, although some coal mine screening equipment with adjustable screen apertures has emerged on the market, such as longitudinally installed multi-layer screens with different apertures, most of these devices have complex structures. Furthermore, during the screening of materials with high moisture content, the screens are not only prone to clogging, but also difficult to clean after clogging, thus affecting screening efficiency. Utility Model Content
[0005] To address the above problems, the purpose of this utility model is to provide a coal screening device for coal mining, which solves the problem mentioned in the background art that the existing screening devices are not convenient for changing screens with different mesh sizes.
[0006] This utility model provides a coal screening device for coal mining, including a screen for screening coal and a support frame set below the screen for supporting and fixing the screen. The screen includes a fine screen section with smaller screen holes and a coarse screen section with larger screen holes. Clamping rings are symmetrically installed at both ends of the screen. The support frame has a rotating groove adapted to the clamping rings. In use, the screen is rotated at a suitable angle along the rotating groove to facilitate the switching between the fine screen section and the coarse screen section, thereby facilitating the screening of coal blocks of different particle sizes.
[0007] Preferably, it also includes a rotating assembly mounted on a support frame, the rotating assembly including a motor and a gear fixedly mounted on the output shaft of the motor, and a plurality of teeth that mesh with the gear are evenly distributed at one end of the screen.
[0008] Preferably, an electric telescopic rod is installed between the support frame and the rotating assembly.
[0009] Preferably, it also includes a controller, which is electrically connected to both the motor and the electric telescopic pole.
[0010] Preferably, the screen is inclined.
[0011] Preferably, a collection trough with a width greater than the diameter of the screen is provided below the screen, and a discharge port is provided on the side of the collection trough near the lowest end of the screen.
[0012] The beneficial effects of this utility model are: by designing a screen that includes a fine screen section and a coarse screen section, and equipping it with a rotatable retaining ring and a rotating groove structure, the device can easily switch screen sections to adapt to the screening requirements of coal blocks of different particle sizes. This design avoids the tedious operation of replacing the entire screen, reduces downtime, and improves production efficiency. The rotation and switching of the screen is simpler than the traditional method of replacing the screen, reducing the difficulty of operation and maintenance costs.
[0013] By incorporating components such as electric telescopic rods, motors, and gears, the screen can be rotated back and forth during coal mine screening, reducing the likelihood of screen clogging, improving screening efficiency, and simultaneously enhancing screening efficiency and the automation level of the equipment. Attached Figure Description
[0014] Figure 1 This is a first-view structural diagram of the present invention;
[0015] Figure 2 This is a schematic diagram of the second-view structure of the present invention;
[0016] Figure 3 This is a schematic diagram of the third-view structure of this utility model;
[0017] Figure 4 This is a first cross-sectional view of the present invention.
[0018] Figure 5 This is a second cross-sectional view of the present invention.
[0019] In the diagram: 1. Screen; 2. Support frame; 3. Fine screen section; 4. Coarse screen section; 5. Snap ring; 6. Rotary trough; 7. Motor; 8. Gear; 9. Tooth; 10. Electric telescopic rod; 11. Controller; 12. Collection trough; 13. Discharge port. Detailed Implementation
[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.
[0021] This utility model relates to a coal screening device for coal mining, which mainly includes a screen 1 for screening coal and a support frame 2 set below the screen 1 to support and fix the screen 1. The screen 1 is usually bolted to the support frame 2. The screen 1 can be plate-shaped or cylindrical. The screen 1 can be installed at an angle to allow the coal to roll on the screen 1, thereby speeding up the coal screening process. In use, the coal to be screened is fed onto the screen 1 along the feed hopper. The coal is screened as it rolls along the screen 1. Coal particles larger than the screen holes of the screen 1 roll down along the screen 1, while coal particles smaller than the screen holes of the screen 1 fall through the screen holes to the bottom of the screen 1. The above is an introduction to a coal screening device for coal mining.
[0022] As can be seen from the above, the existing coal screening equipment used in coal mining has the following defects: the screen 1 in the existing screening equipment is generally fixed and can only screen coal blocks within a specific particle size range. It is not possible to flexibly adjust the screen hole size. When it is necessary to screen coal blocks of different particle sizes, it is often necessary to replace the entire screen 1. This is not only cumbersome to operate, but also increases downtime and affects the production progress. Based on the above problems, this utility model adopts the following improvement method to solve them.
[0023] like Figure 1-5 As shown, a coal screening device for coal mining includes a screen 1 for screening coal and a support frame 2 located below the screen 1 to support and fix it. The screen 1 includes a fine screen section 3 with smaller screen holes and a coarse screen section 4 with larger screen holes. Clamping rings 5 are symmetrically installed at both ends of the screen 1. A rotating groove 6 adapted to the clamping rings 5 is provided on the support frame 2. In use, the screen 1 is rotated along the rotating groove 6 at a suitable angle to facilitate switching between the fine screen section 3 and the coarse screen section 4, thereby facilitating the screening of coal blocks of different particle sizes. This invention, by designing a screen 1 including a fine screen section 3 and a coarse screen section 4, and equipping it with a rotatable clamping ring 5 and rotating groove 6 structure, allows for convenient switching of screen 1 sections to adapt to the screening needs of coal blocks of different particle sizes. This design avoids the cumbersome operation of replacing the entire screen 1, reduces downtime, and improves production efficiency.
[0024] Furthermore, such as Figure 1-5As shown, it also includes a rotating assembly mounted on the support frame 2. The rotating assembly includes a motor 7 and a gear 8 fixedly mounted on the output shaft of the motor 7. One end of the screen 1 has a plurality of teeth 9 evenly distributed to mesh with the gear 8. When the coal to be screened enters the coarse screen section 4 or fine screen section 3 of the screen 1 along the feed hopper, the motor 7 is controlled to reciprocate in the forward and reverse directions, driving the gear 8 to reciprocate clockwise and counterclockwise, driving the screen 1 to reciprocate clockwise and counterclockwise, which can speed up the flow of coal and improve the screening efficiency. At the same time, the screen 1 in motion can also reduce the probability of screen 1 clogging.
[0025] Furthermore, such as Figure 2 As shown, an electric telescopic rod 10 is installed between the support frame 2 and the rotating assembly. To facilitate the adjustment of the screening section of the screen 1 and the reciprocating motion of the screen 1 during the screening process, when it is necessary to adjust the screening section of the screen 1, the electric telescopic rod 10 drives the motor 7 and gear 8 to move upward, so that the gear 8 disengages from the teeth 9. Then, by manually rotating the screen 1, the retaining ring 5 rotates along the retaining groove at a suitable angle, which can adjust the screening section of the screen 1. As shown in the figure, the screen 1 has two screening sections, one of which is a coarse screening section 4, and the fine screening section 3 is arranged opposite to the coarse screening section 4. The overall shape of the screen 1 is cylindrical. Of course, in actual applications, the screening section of the screen 1 can also be set as rectangular, prismatic, or other shapes. As the shape of the screen 1 changes, the number of screening sections will also increase accordingly, which can provide screening sections with different screen hole sizes.
[0026] Furthermore, such as Figure 1-5 As shown, it also includes a controller 11, which is electrically connected to both the motor 7 and the electric telescopic rod 10. The controller 11 presets the upward and downward movement lengths of the electric telescopic rod 10. When the controller 11 controls the electric telescopic rod 10 to move upward a certain distance (e.g., 0.5 meters), during coal screening, the controller 11 will also control the electric telescopic rod 10 to move downward by the same distance (e.g., 0.5 meters), so that the gear 8 can mesh with the teeth 9. It should be noted that when the controller 11 controls the electric telescopic rod 10 to move downward, the screen 1 needs to be adjusted so that the teeth of the gear 8 on the side closest to the screen 1 are exactly between two adjacent teeth 9 on the screen 1. Similarly, the controller 11 also presets the operating angle of the motor 7 in screening mode. When there are two screening sections on the screen 1, the motor 7 rotates 90 degrees in both forward and reverse directions alternately. When there are three screening sections, the motor 7 rotates 60 degrees in both forward and reverse directions alternately. When there are four screening sections, the motor 7 rotates 45 degrees in both forward and reverse directions alternately, and so on.
[0027] Furthermore, such as Figure 1-5As shown, the screen 1 is inclined. The inclined setting of the screen 1 helps the material to slide naturally along the screen 1, improving screening efficiency and material flow. This design reduces the accumulation and blockage of material on the screen 1 and extends the service life of the screen 1.
[0028] Furthermore, such as Figure 3 As shown, a collection trough 12 with a width greater than the diameter of the screen 1 is provided below the screen 1. A discharge port 13 is provided on the side of the collection trough 12 near the lowest end of the screen 1. By setting a collection trough 12 with a width greater than the diameter of the screen 1 and a sloping bottom wall of the receiving cavity opened in the collection trough 12, the equipment can easily collect the screened material and carry out subsequent processing. This design simplifies the material collection process, improves production efficiency, and the design of the collection trough 12 helps to reduce the loss and waste of material during the screening process and improves resource utilization.
Claims
1. A coal mine screening device for use in coal mining, comprising a screen (1) for screening coal and a support frame (2) arranged below the screen (1) and used for supporting and fixing the screen (1), characterized in that: The screen (1) comprises a fine screen part (3) with smaller screen holes and a coarse screen part (4) with larger screen holes, clamping rings (5) are symmetrically arranged at both ends of the screen (1), and rotating grooves (6) matched with the clamping rings (5) are formed in the support frame (2); in use, the screen (1) is rotated by a proper angle along the rotating grooves (6), so that the fine screen part (3) and the coarse screen part (4) can be switched, and the screening of coal blocks with different particle sizes can be realized.
2. A coal mine screening apparatus for use in coal mining according to claim 1, characterised in that: A rotating assembly is further arranged on the support frame (2), the rotating assembly comprises a motor (7) and a gear (8) fixedly arranged on an output shaft of the motor (7), and a plurality of gear teeth (9) matched with the gear (8) are uniformly distributed at one end of the screen (1).
3. A coal mine screening apparatus for use in a coal mine as claimed in claim 1 or 2, characterised in that: An electric telescopic rod (10) is arranged between the support frame (2) and the rotating assembly.
4. A coal mine screening apparatus for use in coal mining according to claim 3, characterised in that: A controller (11) is further arranged, and the controller (11) is electrically connected with the motor (7) and the electric telescopic rod (10).
5. A coal mine screening apparatus for use in coal mining as claimed in claim 4 wherein: The screen (1) is arranged in an inclined mode.
6. A coal mine screening apparatus for use in coal mining according to claim 5, characterised in that: A collecting groove (12) with a width greater than the diameter of the screen (1) is arranged below the screen (1), and a discharging port (13) is formed in the side of the collecting groove (12) close to the lowest end of the screen (1).